The Kaiser Family Foundation released a helpful interactive graphic using their monthly health policy polling today. One snapshot: the favorables for the Affordable Care Act look best through the demographic of those uninsured under the age of 65.
Check it out and play around with the numbers here.
Update: I belatedly noticed that KFF also released a 10 question quiz about the Affordable Care Act. For the record I got all of the questions correct, which depressingly meant I had done better than 99.6% of Americans.